Ghost Users


 
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Operating Systems AIX Ghost Users
# 1  
Old 02-01-2005
Ghost Users

I am having a problem that I cannot figure out. RS6000 server running AIX 5.2. Users connect via TCP/IP and login and work just fine. When the user logs out of the application, I can run the "who" command or "w" command and the O/S still reports the user as logged in.

If I run "ps -tpts/xx" on the port they were on, it returns no processes. If I run "ps -ef|grep username" no processes are returned.

If I reboot the server, the user is removed.

Any ideas?
# 2  
Old 02-07-2005
I would be interested in knowing the answer to your problem also. We are running AIX 4.2 and also have that problem. They do eventually go away though without rebooting.
# 3  
Old 02-08-2005
The answer to your questions is:

Some threads from applications used by the user are kept open even after the user logs off. Some of them have a default auto kill time set and some are not. That varies from OS to OS.
Also, if the user used console, or other x-terms that means that various tty's connections established. UNIX works with proccesses, threads, sessions, tty's.
With the "ps" command you can only see the top level procces.

Also, do a 'netstat -a'

it can help you realise how UDP and sockets are mixed with all the above.

Cheers

Aris :-)
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